I don’t know.
The Sulam was not an apikoros at all. The whole frum world used his perush until Rav Frisch authored his perush. I don’t think Berg from the Kabbalah Centre is an apikoros, either. He just likes money.
Levertov was involved in a translation. He was a meshumad.
Professor Matt made a translation. I am not knowledgable of hs work and cannot determine whether he is or isn’t an apikoros.